Hair dryer



FIG. 1 is a right-side elevational view of a hair dryer showing our new design;

FIG 2 is a top plan view thereof;

FIG. 3 is a left-side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof; and

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a hair dryer, as shown and described. 